[media] add LNA support for DVB API

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb-core/dvb_frontend.c

@@ -1022,6 +1022,7 @@ static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 
 	_DTV_CMD(DTV_STREAM_ID, 1, 0),
 	_DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
+	_DTV_CMD(DTV_LNA, 1, 0),
 
 	/* Get */
 	_DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
@@ -1730,6 +1731,10 @@ static int dtv_property_process_set(struct dvb_frontend *fe,
 	case DTV_INTERLEAVING:
 		c->interleaving = tvp->u.data;
 		break;
+	case DTV_LNA:
+		if (fe->ops.set_lna)
+			r = fe->ops.set_lna(fe, tvp->u.data);
+		break;
 
 	/* ISDB-T Support here */
 	case DTV_ISDBT_PARTIAL_RECEPTION:

drivers/media/dvb-core/dvb_frontend.h

@@ -303,6 +303,7 @@ struct dvb_frontend_ops {
 	int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
 	int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
 	int (*ts_bus_ctrl)(struct dvb_frontend* fe, int acquire);
+	int (*set_lna)(struct dvb_frontend *, int);
 
 	/* These callbacks are for devices that implement their own
 	 * tuning algorithms, rather than a simple swzigzag

include/linux/dvb/frontend.h

@@ -363,8 +363,9 @@ struct dvb_frontend_event {
 #define DTV_ATSCMH_SCCC_CODE_MODE_D	59
 
 #define DTV_INTERLEAVING			60
+#define DTV_LNA					61
 
-#define DTV_MAX_COMMAND				DTV_INTERLEAVING
+#define DTV_MAX_COMMAND				DTV_LNA
 
 typedef enum fe_pilot {
 	PILOT_ON,
@@ -438,6 +439,7 @@ enum atscmh_rs_code_mode {
 };
 
 #define NO_STREAM_ID_FILTER	(~0U)
+#define LNA_AUTO                (~0U)
 
 struct dtv_cmds_h {
 	char	*name;		/* A display name for debugging purposes */